PH48RS

Corn

Variety Description

Variety used for comparison: 'PH25RY'

Summary: The brace roots for 'PH48RS' have a medium intensity of anthocyanin colouration whereas those for 'PH25RY' have an absent or a very weak intensity of anthocyanin colouration. The leaf blade just above the upper ear of 'PH48RS' is narrower than that of 'PH25RY'. The tassel for 'PH48RS' has moderately sparse spikelets whereas those for 'PH25RY'are moderately dense with spikelets. The main axis of the tassel for 'PH48RS' is long whereas that for 'PH25RY' is a medium length. The ear of 'PH48RS' is longer, and including the kernels, has a smaller diameter than that of 'PH25RY'. The ear wings for 'PH48RS' are short and present on a high percentage of plants whereas those for 'PH25KM' are a medium length and present on a medium percentage of plants.

Description:

PLANT: inbred yellow variety, medium ratio of height of insertion of peduncle of upper ear to plant height, anthesis occurs late in season, silk emergence occurs mid season

STEM: absent or very slight degree of zig-zag, medium intensity of anthocyanin colouration on brace roots

LEAF BLADE (JUST ABOVE UPPER EAR): absent or very weak undulation of margin, small angle with stem, straight

TASSEL: absent or very few primary lateral branches, moderately sparse spikelets on middle third of main branch, long main axis
LATERAL BRANCHES: none
GLUME: absent or very weak intensity of anthocyanin colouration at base, weak intensity of anthocyanin colouration at apex and middle
ANTHER (ON MIDDLE THIRD OF MAIN BRANCH OF TASSEL): absent or very weak intensity of anthocyanin colouration

EAR: absent or very weak intensity of anthocyanin colouration of silks, short husk (level with tip), conico-cylindrical shape, medium number of rows of grain, medium intensity of anthocyanin colouration on glumes of cob
EAR WINGS: present on a high percentage of plants, short
KERNEL: dent-like type, yellow on top, yellow orange on dorsal side

TILLERING: present on a low percentage of plants

Origin & Breeding History: 'PH48RS' was developed by Pioneer Hi-Bred International, Inc. using a double haploid plant breeding method. In 2010, a cross was conducted between proprietary inbred lines in Puerto Vallarta, Mexico. In 2011, the F1 generation underwent a haploidization process with subsequent chromosome doubling and selfing. In 2012, selected D1 lines were self pollinated and harvested in bulk. In 2014, the D2 and D3 lines were self pollinated with subsequent ear selections, respectively. 'PH48RS' was selected based on tassel size, pollen production, germination ability, stalk lodging resistance, late season plant health, yield in hybrid combination, grain quality, as well as disease and insect resistance. The D5 seed was bulked as breeder seed in Mankato, Minnesota, USA in 2015.

Tests & Trials: The comparative trial for 'PH48RS' was conducted in Coteau-du-Lac, Quebec during the 2021 growing season. The trial was planted in a RCB design with 3 replicates. Each replicate consisted of one 3 metre long row with 76 cm between the rows. With approximately 20 plants per row, there was a total of 50 to 60 plants per variety. Measured characteristics were based on a minimum of 30 measurements per variety. Mean differences were significant at the 5% probability level based on Student's T-tests. Results were supported by the official technical examination report 202000345, purchased from the Plant Variety Protection Office in Washington, District of Columbia, USA.

Comparison tables for 'PH48RS' with reference variety 'PH25RY'

Leaf blade width (cm)

Ear length (cm)

Ear diameter (including kernels) (cm)

Click on image for larger view

Corn: 'PH48RS' (top) with reference variety 'PH25RY' (bottom)